Mild scoliosis of the thoracic spine is a mild curvature of the spine in the middle or upper part of the spinal column, according to WebMD. Medical professionals divide the spine into three sections: the cervical spine, the thoracic spine and the lumbar spine.
The vertebrae of the cervical spine are in the neck, while the vertebrae of the lumbar spine are in the lower back, according to InnerBody. The vertebrae of the thoracic spine are attached to the ribs and have spinous processes that overlap. The spinous process is a projecting vertebral bone that is felt as a bump in the back, according to Cedars-Sinai.